Digital holographic interferometry for characterization of transparent materials

Year: 2001

Authors: Ferraro P., De Nicola S., Finizio A., Grilli S., Pierattini G.

Autors Affiliation: Istituto Nazionale di Ottica Applicata, Sez. di Napoli, Italy;
Istituto di Cibernetica del CNR, Via Toiano 6, 80072 Arco Felice (NA), Italy

Abstract: Accurate measurement of the refractive index of solids is of great importance in various field of industrial processes. We present and discuss a method based on digital holographic interferometry for measuring refractive indices of transparent materials. Two recorded digital holograms are added producing a digital double exposure hologram. The numerical reconstruction of the interferogram intensity enables to determine the index of refraction of the sample under investigation. Advantages and limitations of the proposed approach are discussed.

Journal/Review: PROCEEDINGS OF SPIE

Volume: 4399      Pages from: 9  to: 16

KeyWords: digital holography
DOI: 10.1117/12.445580

Citations: 7
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